a-be a-do aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aaco aacr aact aacu aada aadc aade aadt aadu aaea aaec aaoe aaoo aara aarc aard aare aaro aart aaru aata aatc aatt abaa abab abac abad abae abar abat abau abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo abdu abec abed abee aber abet aboa abob abod aboo abor abot abou abra abrc abro abta abtu abua abud abue abut ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acco acct accu acda acdb acdc acde acdt ace- acea acec aced acer acet acoa acod acoe acor acot acou acr- acra acrc acre acro acrr acta actc acte acto actt actu acu- acue acuo acur acut adaa adab adac adad adae adao adar adat adba adbc adcc adda addc addd adde addo addr addu adea adeb adee adeo ader adet adob adoc adod adoe adoo ador adot adra adre adro adta adua adub adue adur aeac aecb aect aede aedt aeer aer- aera aerc aerd aero aeta aetc aeto aetr aett aoba aoca aoce aoeu aora aorb aort aotc aotd aout arab arac arad arae arar arat arau arba arbe arc- arca arce arco arct arda ardc arde ardo ardu area arec ared aree areo aret areu aroa arob arod aroe aroo aror arr- arra arrc arre arro arrr arrt arru arta artc arte arto artr arua arub arud arue arut at-t ataa atab atac atad atae atar atat atca atcc atco atcr atdt atea atec ated atee ateo ater atob atoc atod atoe ator atot atra atrc atre atro atru atta atte atto attr attu atua atub atuc atur auaa aube auca auce auct audc aude audo auer aur- aura aurd aure auro aut- aute auto baaa baad baar baat baba babb babe babo babr babu bac- baca bacc bace baco bact bada badb badd bade bado badr badu baed baer bar- bara barb barc bard bare baro barr bart baru bata batc bate bato batt batu bau- baud baur bbad bbau bbbb bbdd bbdo bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcda bcde bcec bcer bcet bcor bcra bcru bctc bcuc bd-r bdbc bddc bead bear beat beau beba bebb bebe bebo beca becu beda bede bedo bedu beeb beed beer beet beo- beod beor beot bera berc berd bere bero berr bert beru beta betc bete beto bett betu beur boab boac boad boar boat boba bobb bobe bobo bobu boca boce boco bocu boda bodb bode bodo bodu boea boec boee boeo boer boet boob booc bood booe boor boot bor- bora bord bore boro borr bort boru bota botb botd bote boto bott boua boud boue bour bout brab brac brad brae brao brat brau brca brcb brce brda brdo brdt brea breb brec bred bree breo brer bret broa brob broc brod broe broo bror brot brou brrr brtc bruc brud brue brut btaa btcc btdt btec btob btor btrc btrt bttb buad buar buat buba bubb bube bubo bubu buca bucc buce buco bucu buda budb budd bude budo budu buea buer bueu bur- bura burb burd bure buro burr burt buru but- buta bute buto butt c-bo c-cd caaa caab caac caat caba cabe cabo cabu cac- caca cacc cace caco cacr cada cadc cadd cade cado cadr cadu caec caer caeu caod caor cara carb carc card care caro carr cart cat- cata catb catc catd cate cato catt catu cauc cauo caut cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbdb cbdc cbdo cbea cbec cbee cber cbet cbot cbrd cbre cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc cccu ccdc ccdr cced ccee ccob ccoc ccod ccra ccrc ccre ccrt cctb cctc cctt ccuc ccut cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdot cdre ceac cead cear ceat ceba cebu cec- ceca cece ceco cect ceda cedd cede cedo cedt cedu ceeb ceec ceor ceou cer- cera cerc cerd cere cero cert cet- ceta cete ceto coad coat coba cobb cobe cobo cobu coca coce coco coct cocu coda codd code coed coob cood coot cor- cora corb corc cord core coro corr cort cota cotb cotc cote coto cott cotu coua coub coud coue cour cout crab crac crar crat crau crbc crbu crca crcc crce crcr crda crdc cre- crea creb crec cred cree creo cret creu crob croc crod croe croo cror crot crrt crtc crub crud crue crut ctab ctae ctba ctca ctec ctor ctot ctrc ctta cuau cub- cuba cubb cube cuca cucc cuce cuda cude cued cuer cura curb curd cure curo curr curt cut- cuta cutc cute cuto cutt d-bo daab daad daae daar daau daba dabb dabo dabt dabu daca dace dact dada dade dado dadu daeb daer daeu daou dara darb darc dard dare daro darr dart daru data date dato datr datt datu daub daud daue daur daut dbar dbcc dbtt dcbc dcca dccb dccc dcct dccu dcdb dcra dctc dddd ddoc ddot ddrc ddre ddub deac dead deae dear deau deba debe debt debu dec- deca decc decd dece deco dect deda dedd dede dedo dedu deeb deed deer deet deor der- dera derb derc dere dero derr deta dete deto detr deua deue deur deut doab doae doar doat doba dobb dobe dobu doca doce doco doct docu dod- doda dodd dode dodo doea doer doob dood door doot dora dorc dord dore doro dorr dort doru dota dotd dote doto dott doub douc doud doue dour dout draa drab drac drad drar drat drau drba drbc drca drda drea dred dree dret drob drod drot drou drra drua drub drue drut druu dtaa dtac dtcc dted dtor dtot duaa duab duad duar duat dub- duba dubb dubc dube dubu duca duce duco duct duda dudd dude dudo dudu duer duet duo- dura